Double-ended electric lamp.



B. SETTEGASE. DOUBLE ENDED ELECTRIC LAMP. APPLICATION FILED MAR.6, 1911.RENEWED MAR. 21, 1912.

1,044,825, Patented Nov. 19,1912.

WITNESSES BIAGIO SETTECASE, or LOUISVILLE, KENTUCKY.

DOTIBLE-ENDED ELECTRIC LAMP.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed March 6, 1911, Serial No. 612,594. Itenewed arch 21,1912. Serial No. 685,370.

and useful Improveme'nt in Double-Ended Electric Lamps, of which" thefollowing is a specification.

This invent-ion relates to electric lighting, and some of tlieobjects ofmy improvement are, simplicity of construction and operation, to showlight on. both sides of a sign or partition with a single lamp, to savelamps, to save current, to save labor and expense in installation, andsaving in maintenance. These and other objects I attain by means of thestructure illustrated in the accompanying drawings, in which f Figure 1is a side elevation of the lamp and a sectional detail view of thesocket and a fragment of a sign or partition; Fig. 2, av

' side elevation of the lamp with a modification of the filament; Fig.3, a side elevation of a sign withlamps applied; and Fig. 4 is a topplan'view of Fig. 3.

' Similar reference-numbers refer to similar parts throughout theseveral views of the drawings.

The globe, 1, is preferably cylindrical-in cross section at its middleand substantially hemispherical at each end. The globe is thus axiallytransparent.

Two cylindrical screw threaded rings, 2

and 3, are secured on the cylindrical middle port-ion of globe 1, aninsulating space, 4, being left between them. One of these rings, 2, :isprovided with a stop flange, 5, which sertes to limit the inwardmovement of the lamp when screwed into its socket and determine thesymmetric positioning of the lamp in a sign or partitio The filament, 6,may be connected by one of its ends to ring 2 at 7, by means of theconventional platinum wire which is sealed in the glass of the globe,and by its opposite end to ring 3 at, 8, inthe same manner. It may beheld by a support, 9, at 10, 11, and 12. The-support 9 may be secured tothe glass by inserting in a lug, 13.

In the modification, Fig. 2, the connections for the filament passthrough lug 13 and are secured to the rings 2 and 3 imme-. diately atthe lug, and the filament is supported at 10, 11, and 1 1. The filamentmay be arranged in any suitable manner. rings 2 and 3 form the poles forthe lamp.

A two part socket is provided, comprising sockets, 15 and 1G,.arrangedin axial alinement, or a single socket, 15, may extend en tirely acrossbot-h rings 2 and 3. The socket 15 comprises an insulating bushing, 17,made preferably of porcelain, and a metal lining, 18, made preferably ofsheet metal. screw, 19, or other suitablemeansfor 0on necting wires, 20,is provided in electrical connection with lining 18. In the frontwasher, 21, which forms a protecting face and serves to prevent breakingthe lamp if wall of bushing 17 is secured a soft rubber 2 preferablymade with two Walls, 23 and 24,

with a space, 25, left between them. The wires 20 may be applied betweenthe walls 23 and 24:, in space 25 and thus be concealed and protected.

It will be understood that the lamp may .be inserted in the socket fromeither side,

and is stopped in proper symmetrical and operative position by flange 5engaging washer 21. Having thus described my invention, so that anyoneskilled in the art pertaining thereto'may understand its constructionand use, I claim-- 1 1. An incandescent electric lamp, comprising adouble-ended globe, and a pair of pole rings secured around the middleportion of said globe.

2. An incandescent electric lamp, comprising a double-ended globe, apair of pole rings secured around the middle portion of said globe, anda filament having an .end connected'with each of said pole rings.

3. An incandescent electric lamp, comprising a double-ended globe, apairof pole rings around the middle portion of said globe, andv a. stopflange on the outer edge of with and roviding electrical connecting forone of said pole rings.

each of sand pole rmgs. .4. An incandescent electric lamp, comprising adouble-ended globe, a. pair of threaded v BIAGIO SETTECASE' pole rin ssecured on the m1ddle portion of Witnesses: said glo e, and a doublesocket, provided ABRAHAM KNOBEL,

with a threaded pole ring corresponding MARIA K. BEYNROTH.

Copies of this patient may be obtained for five cents each, byaddressing the Commissioner of intent,

' Washington, D. 0."

